CAccessibleHypertext.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- *//* vim:expandtab:shiftwidth=2:tabstop=2: *//* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is mozilla.org code. * * The Initial Developer of the Original Code is * Mozilla Foundation. * Portions created by the Initial Developer are Copyright (C) 2007 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Alexander Surkov <surkov.alexander@gmail.com> (original author) * * Alternatively, the contents of this file may be used under the terms of * either the GNU General Public License Version 2 or later (the "GPL"), or * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */#include "CAccessibleHypertext.h"#include "AccessibleHypertext_i.c"#include "nsIAccessibleHypertext.h"#include "nsIWinAccessNode.h"#include "nsAccessNodeWrap.h"#include "nsCOMPtr.h"// IUnknown
STDMETHODIMP
CAccessibleHypertext::QueryInterface(REFIID iid, void** ppv)
{
*ppv = NULL;
if (IID_IAccessibleHypertext == iid) {
nsCOMPtr<nsIAccessibleHyperText> hyperAcc(do_QueryInterface(this));
if (!hyperAcc)
return E_NOINTERFACE;
*ppv = static_cast<IAccessibleHypertext*>(this);
(reinterpret_cast<IUnknown*>(*ppv))->AddRef();
return S_OK;
}
returnCAccessibleText::QueryInterface(iid, ppv);
}
// IAccessibleHypertext
STDMETHODIMP
CAccessibleHypertext::get_nHyperlinks(long *aHyperlinkCount)
{
__try {
*aHyperlinkCount = 0;
nsCOMPtr<nsIAccessibleHyperText> hyperAcc(do_QueryInterface(this));
if (!hyperAcc)
return E_FAIL;
PRInt32 count = 0;
nsresult rv = hyperAcc->GetLinks(&count);
*aHyperlinkCount = count;
if (NS_SUCCEEDED(rv))
return S_OK;
} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }
return E_FAIL;
}
STDMETHODIMP
CAccessibleHypertext::get_hyperlink(long aIndex,
IAccessibleHyperlink **aHyperlink)
{
__try {
*aHyperlink = NULL;
nsCOMPtr<nsIAccessibleHyperText> hyperAcc(do_QueryInterface(this));
if (!hyperAcc)
return E_FAIL;
nsCOMPtr<nsIAccessibleHyperLink> hyperLink;
hyperAcc->GetLink(aIndex, getter_AddRefs(hyperLink));
if (!hyperLink)
return E_FAIL;
nsCOMPtr<nsIWinAccessNode> winAccessNode(do_QueryInterface(hyperLink));
if (!winAccessNode)
return E_FAIL;
void *instancePtr = NULL;
nsresult rv = winAccessNode->QueryNativeInterface(IID_IAccessibleHyperlink,
&instancePtr);
*aHyperlink = static_cast<IAccessibleHyperlink*>(instancePtr);
if (NS_SUCCEEDED(rv))
return S_OK;
} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }
return E_FAIL;
}
STDMETHODIMP
CAccessibleHypertext::get_hyperlinkIndex(long aCharIndex, long *aHyperlinkIndex)
{
__try {
*aHyperlinkIndex = 0;
nsCOMPtr<nsIAccessibleHyperText> hyperAcc(do_QueryInterface(this));
if (!hyperAcc)
return E_FAIL;
PRInt32 index = 0;
nsresult rv = hyperAcc->GetLinkIndex(aCharIndex, &index);
*aHyperlinkIndex = index;
if (NS_SUCCEEDED(rv))
return S_OK;
} __except(nsAccessNodeWrap::FilterA11yExceptions(::GetExceptionCode(), GetExceptionInformation())) { }
return E_FAIL;
}